@UiHandler({"fuf0", "fuf1", "fuf2", "fuf3", "fuf4"})
 void onFormKeyUp(KeyUpEvent event) {
   if ((event.getNativeKeyCode() == KeyCodes.KEY_BACKSPACE)
       || (event.getNativeKeyCode() == KeyCodes.KEY_DELETE)) {
     TextField tf = (TextField) event.getSource();
     for (IPCFileUploadField fuf : fufList) {
       String value = fuf.getValue();
       String currentValue = tf.getCurrentValue();
       if (value.equalsIgnoreCase(currentValue)) {
         fuf.clear();
         fuf.validate(true);
         break;
       }
     }
   }
 }
 @UiHandler({"btn0", "btn1", "btn2", "btn3", "btn4"})
 void onResetClicked(SelectEvent event) {
   IPCFileUploadField uField = fufList.get(tbList.indexOf(event.getSource()));
   uField.reset();
   uField.validate(true);
 }